— 149 — 
15.F.antipyretica L. — F. Howellii Ren. et Card. ? 
. Leaves of stem ovate-oblong with gen. obtuse not long acumen; 
alar cells brown gen. not well-defined, the others us. sublinear- 
fusiform. Branch-leaves us. not much narrower. © Perichetial 
leaves us. obtuse. Capsule oval or oval-oblong r. round-oval; 
teeth red; lid obtuse subconvex or short-conic. Very variable, 
— A var. with broader leaves and wider cells often is mistaken 
for F. gigantea Sulliv.; its leaves are often copper reddish, — 
Common in running water, r. in marshes and in alp. regions. 
Eur. Sweden! Amer. Can.: Macoun. U. $: Delamare, com. 
~ : Cardot. 
*F.graeilis Lindberg. 
. Leaves more heteromorphous; the vernal of stem soon deci- 
duous, those of branches us. as narrow as in F. dalecarlica. 
Capsule often round-oval. Eur. probably not r. Sweden! Finl.: 
Lackstrcem, com. Brotherus. Austria: Venturi. 
* F.arverniea Renauld. 
»Leaves oblong-lanceolate, sometimes with 2—5 teeth at apex. 
>> Lakes r. Eur. France: Renauld»: Cardot l. c. 
* F.ealifornica Sullivant. : 
. Leaves often less distinctly conduplicate, gen. broad and nearly 
uniform; alar cells more distinct subhyaline. — Stagnant wa- 
ter r. Amer, U. S.: Bolznder, com. C. Mueller and J, Cardot. 
* F.Durizi Schimper. ; 
Leaves as in last subspecies but slightly denticulate at apex; 
apical cells suboval, middle sublanceolate. Hur. r. France: 
pagne, com. Husnot. (Africa: Durieu, com. Husnot.) Amer. 
= 2U. B.»: Cardot. 
F.islandiea Cardot. — 
_ ?Leaves narrower, sharply long-acuminate; areolation irregular. 
Eur. Iceland»; Cardot. 
" F.sparsifolia Limpricht. : 
»Leaves lanceolate-linear. Peristomial teeth yellowish red, 
Habit of F. antip. *gracilis but more slender. — Eur. Norway: 
E Limpricht. 
‘androgyna Ruthe. : 
enr ridi decurrent; alar cells well-defined. Paroecious. 
— Eur. Germany: Ruthe»: Limpricht. : 
2 i F.neomexicana Sullivant et Lesquereux;. Sull ie. m. 
. "MF. antipyretica var.»: Cardot. d 
Differs, sra F. antipyretica: Leaves less distant and longer- 
decurrent, bright green or yellowish glossy; alar cells well-defined, 
